(19)
(11) EP 0 428 823 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.01.1992 Bulletin 1992/02

(43) Date of publication A2:
29.05.1991 Bulletin 1991/22

(21) Application number: 90110944.7

(22) Date of filing: 09.06.1990
(51) International Patent Classification (IPC)5: A47G 23/03, C09D 11/00, B44F 1/10
(84) Designated Contracting States:
DE ES FR GB IT

(30) Priority: 20.11.1989 JP 301089/89

(71) Applicant: Kawashima, Kiyoharu
Suita-shi Osaka-fu (JP)

(72) Inventor:
  • Kawashima, Kiyoharu
    Suita-shi Osaka-fu (JP)

(74) Representative: Türk, Gille, Hrabal, Leifert 
Brucknerstrasse 20
40593 Düsseldorf
40593 Düsseldorf (DE)


(56) References cited: : 
   
       


    (54) Coaster for glass


    (57) A coaster (1) comprises an upper sheet (2) having transparency and permeability, a printed sheet (4) provided with a color-changing area facing the upper sheet, and a color former (5) for changing the color-changing area. The color-changing area is printed by an ink containing a color-changing agent which changes from substantially invisible colorless state to a visible color state by applying a color former. The color former is set in the coaster such a way that the color former can melt out for applying to the color-changing agent by means of water permeating through the upper sheet.







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